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v/vlib/os/os_nix.c.v

504 lines
10 KiB
V

module os
import strings
#include <dirent.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/utsname.h>
#include <sys/types.h>
#include <utime.h>
$if !solaris && !haiku && !emscripten ? {
#include <sys/ptrace.h>
}
pub const (
path_separator = '/'
path_delimiter = ':'
)
const executable_suffixes = ['']
const (
stdin_value = 0
stdout_value = 1
stderr_value = 2
)
// (Must be realized in Syscall) (Must be specified)
// ref: http://www.ccfit.nsu.ru/~deviv/courses/unix/unix/ng7c229.html
pub const (
s_ifmt = 0xF000 // type of file
s_ifdir = 0x4000 // directory
s_iflnk = 0xa000 // link
s_isuid = 0o4000 // SUID
s_isgid = 0o2000 // SGID
s_isvtx = 0o1000 // Sticky
s_irusr = 0o0400 // Read by owner
s_iwusr = 0o0200 // Write by owner
s_ixusr = 0o0100 // Execute by owner
s_irgrp = 0o0040 // Read by group
s_iwgrp = 0o0020 // Write by group
s_ixgrp = 0o0010 // Execute by group
s_iroth = 0o0004 // Read by others
s_iwoth = 0o0002 // Write by others
s_ixoth = 0o0001 // Execute by others
)
fn C.utime(&char, voidptr) int
fn C.uname(name voidptr) int
fn C.symlink(&char, &char) int
fn C.link(&char, &char) int
fn C.gethostname(&char, int) int
// Note: not available on Android fn C.getlogin_r(&char, int) int
fn C.getlogin() &char
fn C.getppid() int
fn C.getgid() int
fn C.getegid() int
fn C.ptrace(u32, u32, voidptr, int) u64
enum GlobMatch {
exact
ends_with
starts_with
start_and_ends_with
contains
any
}
fn glob_match(dir string, pattern string, next_pattern string, mut matches []string) []string {
mut subdirs := []string{}
if is_file(dir) {
return subdirs
}
mut files := ls(dir) or { return subdirs }
mut mode := GlobMatch.exact
mut pat := pattern
if pat == '*' {
mode = GlobMatch.any
if next_pattern != pattern && next_pattern != '' {
for file in files {
if is_dir('$dir/$file') {
subdirs << '$dir/$file'
}
}
return subdirs
}
}
if pat == '**' {
files = walk_ext(dir, '')
pat = next_pattern
}
if pat.starts_with('*') {
mode = .ends_with
pat = pat[1..]
}
if pat.ends_with('*') {
mode = if mode == .ends_with { GlobMatch.contains } else { GlobMatch.starts_with }
pat = pat[..pat.len - 1]
}
if pat.contains('*') {
mode = .start_and_ends_with
}
for file in files {
mut fpath := file
f := if file.contains(os.path_separator) {
pathwalk := file.split(os.path_separator)
pathwalk[pathwalk.len - 1]
} else {
fpath = if dir == '.' { file } else { '$dir/$file' }
file
}
if f in ['.', '..'] || f == '' {
continue
}
hit := match mode {
.any {
true
}
.exact {
f == pat
}
.starts_with {
f.starts_with(pat)
}
.ends_with {
f.ends_with(pat)
}
.start_and_ends_with {
p := pat.split('*')
f.starts_with(p[0]) && f.ends_with(p[1])
}
.contains {
f.contains(pat)
}
}
if hit {
if is_dir(fpath) {
subdirs << fpath
if next_pattern == pattern && next_pattern != '' {
matches << '$fpath$os.path_separator'
}
} else {
matches << fpath
}
}
}
return subdirs
}
fn native_glob_pattern(pattern string, mut matches []string) ! {
steps := pattern.split(os.path_separator)
mut cwd := if pattern.starts_with(os.path_separator) { os.path_separator } else { '.' }
mut subdirs := [cwd]
for i := 0; i < steps.len; i++ {
step := steps[i]
step2 := if i + 1 == steps.len { step } else { steps[i + 1] }
if step == '' {
continue
}
if is_dir('$cwd$os.path_separator$step') {
dd := if cwd == '/' {
step
} else {
if cwd == '.' || cwd == '' {
step
} else {
if step == '.' || step == '/' { cwd } else { '$cwd/$step' }
}
}
if i + 1 != steps.len {
if dd !in subdirs {
subdirs << dd
}
}
}
mut subs := []string{}
for sd in subdirs {
d := if cwd == '/' {
sd
} else {
if cwd == '.' || cwd == '' {
sd
} else {
if sd == '.' || sd == '/' { cwd } else { '$cwd/$sd' }
}
}
subs << glob_match(d.replace('//', '/'), step, step2, mut matches)
}
subdirs = subs.clone()
}
}
pub fn utime(path string, actime int, modtime int) ! {
mut u := C.utimbuf{actime, modtime}
if C.utime(&char(path.str), voidptr(&u)) != 0 {
return error_with_code(posix_get_error_msg(C.errno), C.errno)
}
}
pub fn uname() Uname {
mut u := Uname{}
utsize := sizeof(C.utsname)
unsafe {
x := malloc_noscan(int(utsize))
d := &C.utsname(x)
if C.uname(d) == 0 {
u.sysname = cstring_to_vstring(d.sysname)
u.nodename = cstring_to_vstring(d.nodename)
u.release = cstring_to_vstring(d.release)
u.version = cstring_to_vstring(d.version)
u.machine = cstring_to_vstring(d.machine)
}
free(d)
}
return u
}
pub fn hostname() string {
mut hstnme := ''
size := 256
mut buf := unsafe { &char(malloc_noscan(size)) }
if C.gethostname(buf, size) == 0 {
hstnme = unsafe { cstring_to_vstring(buf) }
unsafe { free(buf) }
return hstnme
}
return ''
}
pub fn loginname() string {
x := C.getlogin()
if !isnil(x) {
return unsafe { cstring_to_vstring(x) }
}
return ''
}
fn init_os_args(argc int, argv &&u8) []string {
mut args_ := []string{len: argc}
for i in 0 .. argc {
args_[i] = unsafe { tos_clone(argv[i]) }
}
return args_
}
pub fn ls(path string) ![]string {
if path.len == 0 {
return error('ls() expects a folder, not an empty string')
}
mut res := []string{cap: 50}
dir := unsafe { C.opendir(&char(path.str)) }
if isnil(dir) {
return error('ls() couldnt open dir "$path"')
}
mut ent := &C.dirent(0)
// mut ent := &C.dirent{!}
for {
ent = C.readdir(dir)
if isnil(ent) {
break
}
unsafe {
bptr := &u8(&ent.d_name[0])
if bptr[0] == 0 || (bptr[0] == `.` && bptr[1] == 0)
|| (bptr[0] == `.` && bptr[1] == `.` && bptr[2] == 0) {
continue
}
res << tos_clone(bptr)
}
}
C.closedir(dir)
return res
}
// mkdir creates a new directory with the specified path.
pub fn mkdir(path string, params MkdirParams) ! {
if path == '.' {
return
}
apath := real_path(path)
r := unsafe { C.mkdir(&char(apath.str), params.mode) }
if r == -1 {
return error(posix_get_error_msg(C.errno))
}
}
// execute starts the specified command, waits for it to complete, and returns its output.
[manualfree]
pub fn execute(cmd string) Result {
// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
// return Result{ exit_code: -1, output: ';, &&, || and \\n are not allowed in shell commands' }
// }
pcmd := if cmd.contains('2>') { cmd.clone() } else { '$cmd 2>&1' }
defer {
unsafe { pcmd.free() }
}
f := vpopen(pcmd)
if isnil(f) {
return Result{
exit_code: -1
output: 'exec("$cmd") failed'
}
}
fd := fileno(f)
mut res := strings.new_builder(1024)
defer {
unsafe { res.free() }
}
buf := [4096]u8{}
unsafe {
pbuf := &buf[0]
for {
len := C.read(fd, pbuf, 4096)
if len == 0 {
break
}
res.write_ptr(pbuf, len)
}
}
soutput := res.str()
exit_code := vpclose(f)
return Result{
exit_code: exit_code
output: soutput
}
}
// raw_execute does the same as `execute` on Unix platforms.
// On Windows raw_execute starts the specified command, waits for it to complete, and returns its output.
// It's marked as `unsafe` to help emphasize the problems that may arise by allowing, for example,
// user provided escape sequences.
[unsafe]
pub fn raw_execute(cmd string) Result {
return execute(cmd)
}
[manualfree]
pub fn (mut c Command) start() ! {
pcmd := c.path + ' 2>&1'
defer {
unsafe { pcmd.free() }
}
c.f = vpopen(pcmd)
if isnil(c.f) {
return error('exec("$c.path") failed')
}
}
[manualfree]
pub fn (mut c Command) read_line() string {
buf := [4096]u8{}
mut res := strings.new_builder(1024)
defer {
unsafe { res.free() }
}
unsafe {
bufbp := &buf[0]
for C.fgets(&char(bufbp), 4096, c.f) != 0 {
len := vstrlen(bufbp)
for i in 0 .. len {
if bufbp[i] == `\n` {
res.write_ptr(bufbp, i)
final := res.str()
return final
}
}
res.write_ptr(bufbp, len)
}
}
c.eof = true
final := res.str()
return final
}
pub fn (mut c Command) close() ! {
c.exit_code = vpclose(c.f)
if c.exit_code == 127 {
return error_with_code('error', 127)
}
}
pub fn symlink(origin string, target string) ! {
res := C.symlink(&char(origin.str), &char(target.str))
if res == 0 {
return
}
return error(posix_get_error_msg(C.errno))
}
pub fn link(origin string, target string) ! {
res := C.link(&char(origin.str), &char(target.str))
if res == 0 {
return
}
return error(posix_get_error_msg(C.errno))
}
// get_error_msg return error code representation in string.
pub fn get_error_msg(code int) string {
return posix_get_error_msg(code)
}
pub fn (mut f File) close() {
if !f.is_opened {
return
}
f.is_opened = false
C.fflush(f.cfile)
C.fclose(f.cfile)
}
[inline]
pub fn debugger_present() bool {
// check if the parent could trace its process,
// if not a debugger must be present
$if linux {
return C.ptrace(C.PTRACE_TRACEME, 0, 1, 0) == -1
} $else $if macos {
return C.ptrace(C.PT_TRACE_ME, 0, voidptr(1), 0) == -1
}
return false
}
fn C.mkstemp(stemplate &u8) int
// ensure_folder_is_writable checks that `folder` exists, and is writable to the process
// by creating an empty file in it, then deleting it.
[manualfree]
pub fn ensure_folder_is_writable(folder string) ! {
if !exists(folder) {
return error_with_code('`$folder` does not exist', 1)
}
if !is_dir(folder) {
return error_with_code('`$folder` is not a folder', 2)
}
tmp_perm_check := join_path_single(folder, 'XXXXXX')
defer {
unsafe { tmp_perm_check.free() }
}
unsafe {
x := C.mkstemp(&char(tmp_perm_check.str))
if -1 == x {
return error_with_code('folder `$folder` is not writable', 3)
}
C.close(x)
}
rm(tmp_perm_check)!
}
[inline]
pub fn getpid() int {
return C.getpid()
}
[inline]
pub fn getppid() int {
return C.getppid()
}
[inline]
pub fn getuid() int {
return C.getuid()
}
[inline]
pub fn geteuid() int {
return C.geteuid()
}
[inline]
pub fn getgid() int {
return C.getgid()
}
[inline]
pub fn getegid() int {
return C.getegid()
}
// Turns the given bit on or off, depending on the `enable` parameter
pub fn posix_set_permission_bit(path_s string, mode u32, enable bool) {
mut s := C.stat{}
mut new_mode := u32(0)
path := &char(path_s.str)
unsafe {
C.stat(path, &s)
new_mode = s.st_mode
}
match enable {
true { new_mode |= mode }
false { new_mode &= (0o7777 - mode) }
}
C.chmod(path, int(new_mode))
}